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The Ring's Tan Line (illustration)
FILE No.188Unsolved

The Ring's Tan Line

Difficulty ★★☆about 5 minTheft CaseTracesTestimony
A man who says he never took off his ring has no tan line on his finger.

Case Record

A ring was stolen from a jewelry store. In summer, the suspect said, "I haven't taken my ring off once since I got married." The suspect works outdoors every day, and his face and arms are tanned.

But on his left ring finger (the ring is a fairly thick one, about 1 cm wide), there is no pale, untanned band where the ring would have been. (If a ring is worn constantly, the skin under it does not tan, and a pale band remains.)

Your question

What can most naturally be said from this?

Case Files

Diagram

The suspect's ring fingerItemDetailClaim"I have never taken my ring off since the wedding"WorkOutdoors daily; face and arms tannedFingerNo pale band where the ring (about 1 cm wide) wouldbe
Diagram

Hints

If you get stuck, open the hints one at a time, in order.

Open hint 1

What happens to the finger if you keep wearing a ring?

Open hint 2

Is there a pale band?

Open hint 3

Does it fit "never taken off"?

Solve It

Your question

What can most naturally be said from this?

Choose the answer closest to the truth.

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The Truth

It does not match the claim "never taken off"

The answer is "It does not match the claim 'never taken off.'"

If a ring is worn continuously, the skin under it does not tan, and a pale band remains. Its absence raises the suspicion that there was a period when he had taken the ring off.

There is no information that he wears a ring on his right hand or that he is the type that does not tan.

What a never-removed ring leavesA pale band under the ringThe suspect: no pale bandNo band → the ring was probably off at times. It conflicts with theclaim.
Diagram of the solution

Key Points

  • Check the testimony by the presence or absence of a trace
  • "Not there" is a clue too
  • Compare without prejudging the testimony

Why people get fooled

Because you simply believe the story about the ring.

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